// Helper functions for accessing the WeChat Graph API.
const httpsRequest = require('./httpsRequest');
var Parse = require('parse/node').Parse;

// Returns a promise that fulfills iff this user id is valid.
function validateAuthData(authData) {
  return graphRequest(
    'auth?access_token=' + authData.access_token + '&openid=' + authData.id
  ).then(function(data) {
    if (data.errcode == 0) {
      return;
    }
    throw new Parse.Error(
      Parse.Error.OBJECT_NOT_FOUND,
      'wechat auth is invalid for this user.'
    );
  });
}

// Returns a promise that fulfills if this app id is valid.
function validateAppId() {
  return Promise.resolve();
}

// A promisey wrapper for WeChat graph requests.
function graphRequest(path) {
  return httpsRequest.get('https://api.weixin.qq.com/sns/' + path);
}

module.exports = {
  validateAppId,
  validateAuthData,
};
